US5996389A - Machining center for processing flat workpieces with a segment distributed hold-down - Google Patents

Machining center for processing flat workpieces with a segment distributed hold-down Download PDF

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Publication number
US5996389A
US5996389A US09/261,336 US26133699A US5996389A US 5996389 A US5996389 A US 5996389A US 26133699 A US26133699 A US 26133699A US 5996389 A US5996389 A US 5996389A
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Prior art keywords
segments
coupling
carrier
segment
processing machine
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US09/261,336
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English (en)
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Hermann Kaltenbach
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EHT Werkzeugmaschinen GmbH
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EHT Werkzeugmaschinen GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D33/00—Accessories for shearing machines or shearing devices
    • B23D33/08—Press-pads; Counter-bases; Hold-down devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work

Definitions

  • the invention concerns a processing machine for flat workpieces, especially for producing bent edges on sheet parts and/or for cutting or stamping of workpieces formed from sheet metal with a horizontal, and in particular, a strip-like workpiece holder and with a processing tool as well as with a hold-down device subdivided into individual segments arranged near the processing tool for clamping the workpiece on the workpiece holder.
  • the segments are arranged in a row alongside one another in the direction of the orientation of the workpiece holder and a processing line, and in particular a bending line, and are movably and fixably mounted in this direction, whereby they are electively separable or couplable with an adjusting drive extending basically over the length of the hold-down device.
  • a processing machine of this general type is known from EP-0 258 204 B1.
  • the shifting of individual segments of the hold-down device here serves to take undercuts arising from sheet metal processing into consideration and to be able to remove the hold-own device from the workpiece despite such undercuts.
  • the movable segments are individually adjustable by means of an adjusting rod in connection with the known processing machine, whereby each segment has its own clamp coupling for connection with this adjusting rod. In the coupled position, the segments are carried along and moreover displace the additional segments lying in front of the coupled segment viewed in the direction of adjustment.
  • each segment requires its own clamp coupling with an associated activation.
  • the segments To be able to selectively connect the segments with the adjusting rod or a carrier, they have recesses running transversely to the adjusting rod in which in any given case a clamping element can be moved.
  • Each clamping element must be loaded in the clamping seat by two clamping springs whose force must be cancelled out by adjusting cylinders.
  • These adjusting cylinders require appropriate bore holes for a pressure medium.
  • a pilot valve is necessary for control in any given case which for its part needs an appropriate connection with a control.
  • the individual segments must thus also have a minimum dimension in order to be able to accommodate the coupling which consists of clamping elements and activating elements in any given case.
  • a coupling element is continuously adjustable or movable in the direction of the row formed by the segments, and the coupling element is couplable with a segment in any arbitrary position of the latter, and in that each segment has a matching coupling for separable connection with the adjustable coupling element.
  • the element of the adjustment drive which carries the coupling element is arranged in an interior cavity within a carrier holding the segments arranged alongside one another, and if the coupling element has a projecting coupling driving unit projecting area-wise in relation to its confines which in the coupling position protrudes in relation to the adjacent area of the contour of the carrier.
  • the arrangement of an interior cavity of the carrier protects the coupling element and the adjustment drive from contamination and avoids an additional space requirement.
  • the coupling element can be placed such that it can, for example, be pushed above the segments when the coupling driving unit is moved into place. After it has been rotated, however, the coupling drive can engage into the appropriate counter coupling of the segment from above.
  • the coupling process becomes especially simple if the adjustment drive is a linear drive and if the coupling element is rotable on the adjustment drive about an axis parallel to the adjustment drive or oriented in the direction of orientation of the adjustment drive, and this way the coupling drive (preferably constructed as a projection) is pivotable about this axis into the coupling position or out of the coupling position. Further, it is beneficial if the adjustment drive constructed as a linear drive protrudes above the row of segments at least on one side and has a drive motor in this protruding area. This way, only little space is required for the moving drive in continuation of the row of segments.
  • the coupling element can simply be moved into the respective position corresponding to a segment to be adjusted, and then swung into the coupling position there in order to be able to displace further segments situated in front of it by a ether adjustment movement in the direction of adjustment.
  • a worm drive with a rotable spindle and owing to this a nut adjustable axially on the spindle, is provided, and if the coupling element is pivoted in or on the nut of this worm drive, and the spindle is adjustable in an axial direction by rotating the stationary spindle by means of the nut.
  • the nut belonging to the worm drive can thus be adjusted in an axial direction parallel to the row of segments so that the coupling element borne by this nut can likewise be appropriately adjusted.
  • shifting of individual segments can moreover take place in this way. Consequently, little space is needed in an axial direction for the adjustment drive because it suffices to couple a drive motor on the spindle. Therefore, a space-occupying pushing and pulling rod for adjusting the segments is avoided.
  • an adjustment element can run for rotating the coupling element into and out of coupling engagement. Consequently, the coupling can first of all be brought into the coupling position by rotating the spindle and then be coupled in with the aid of the parallel adjustment element and uncoupled again following a sliding motion of the segments.
  • a toothed shaft runs parallel to the spindle which carries the nut with the coupling element which is rotable in relation to it and which is adjusted in the direction of the series of segments, whose axially-running teeth mesh with a matching gearing arranged on the coupling element or a gear segment.
  • a toothed shaft can be arranged in a space-saving manner parallel to the spindle, but does not hinder the axial adjustment of the coupling element because its teeth can be pushed in an axial direction along the gears of the toothed shaft. In each position, however, the coupling element can then also be rotated by turning the toothed shaft.
  • the toothed shaft can be arranged and mounted above the spindle within the carrier for the segments in an interior longitudinal cavity. Consequently, this shaft is also protected and accommodated in a space-saving manner, and is situated at a place on which the actual coupling process, that means the swinging in and out of the coupling driving unit into the matching coupling, is not hindered.
  • the carrier has two grooves or undercuts staggered in relation to each other open toward the same side which are set at a distance to each other horizontally, into which the protrusions arranged on the segment in question fit, between which the front face having the matching coupling runs.
  • the uncoupled position such an unlatched segment can be pushed in the direction and this way released from the connection in which the grooves are open, appropriately perhaps in a horizontal direction, and at the same time traverse to the sliding direction and toward the side toward at which the grooves are open.
  • the individual segments can be hooked with the grooves in the operating position and be pushed in the direction of orientation of these grooves without difficulty according to a yet to be described opening of the grooves or a mounting, but removed from these grooves transversely to the direction of displacement.
  • the carrier bears at least one or several continuous connection strips which has or have one or more retaining rails overlapping the segments in their retaining area, through which the segments can be fixed on the carrier in their engagement position.
  • the connection strip needs to be only slightly loosened. In contrast, it can be correspondingly opened for exchanging or removing segments.
  • connection strips are adjustable into an open and closed position by means of working cylinders arranged over their length, and preferably embedded in the carrier. Since these working cylinders are all to be activated simultaneously for loosening or opening or closing the connection strips, there results a very simple activation.
  • connection strips can be subdivided into individual comb-like rails, and the distance between individual rails can be less that the width of the segments oriented in the direction of displacement, even of the narrowest segment. This way it is assured that even with narrow measurement tolerances, each segment can be securely clamped in its holding position. With a connection strip with a continuous retaining rail, it cannot be ruled out with certainty that one or other segment could remain somewhat loose due to bracing on neighboring regions. The individual segments nonetheless can compensate for small differences in measurement in the course of the row of segments on the basis of clamping power and a certain internal elasticity.
  • the retaining rail or its individual rails can have an arrangement on the carrier and an arrangement on the segment. This way, a more secure latching and a good mounting of the segments is attained, even if within a series, one or more segments are detached and removed.
  • the individual rails engaging wholly or partially on a respective segment therefore attain a sufficient hold even if a segment is temporarily missing.
  • a latch for fixing the holding position of each segment on the carrier can be provided on each segment, which latch can be arranged adjacent to the projection set off from the connection strip which engages into the deeper lying undercut on the carrier.
  • the latch in particularly vertically mobile on the segment and somewhat overlapping the carrier in the latched position, can thus prevent the segment from being removed from the undercut. This is above all advantageous if one or another segment is to be removed.
  • the connection strip must be opened so that it is appropriate if all segments which are not to be removed are fixed in their latches so that a segment cannot slip out of its mounting unintentionally.
  • a continuous longitudinal recess can be provided on the carrier into which the latch engages in the locking position so that does not have to project over the front or outside of the carrier.
  • Each segment can have at least one recess as a matching coupling for the coupling projection or coupling driving unit of the coupling element on its upper front face in an operating position located between the projections interacting with the undercuts of the support, the width of which approximately corresponds to that of this coupling projection in the displacement direction. Consequently, a very simple matching coupling results which is already realized through a recess. This can be applied on the front face without difficulty, for example, countersunk, so that no expensive fastenings of coupling elements to the individual segments are needed.
  • the recess serving as a matching coupling is open on a segment toward a side in a direction of movement and is bounded by the adjacent segment. A recess unilaterally open in this form can be even more simply applied.
  • the recess can be jointly used when separating the segment to be displaced from the segments not to be displaced.
  • the coupler drive has a greater width than that of the open recess on the one side, and an inlet slope is provided on it or the recess. This way, it is assured during coupling that the segment with the recess is somewhat separated from its neighboring segment so that, possibly during movement, a segment sticking owing to oil or the like cannot be unintentionally be moved along with it.
  • Restricted recesses can be provided on both sides of wide segments as a matching coupling. In the event that these restricted recesses on both sides are present in addition to a recess open on the edge side, thus only a one side restricted recess, the user has the choice of whether to couple an individual segment on a two side restricted recess or, however, chiefly in moving several segments together from segments not to be separated, to engage into the edge-side open recess with the coupling projection or coupling driving unit.
  • Wide segments can if need be also have an edge-side open recess on their two edges in any given case in order to be able to selectively separate segments situated to their left and right.
  • the arrangement of the invention of a coupling element on an adjustment drive can be used in the same way, whereby then in any given case such a coupling element with associated drive is to be provided for the group of segments situated on both sides of the central slide so that the segments arranged on both sides of the central slide can be displaced individually or in groups in any given case.
  • a further configuration of the processing machine of the invention provides that the carrier bearing the segments separably (which ends with the central slide in any given case in connection with a processing machine with a central slide) for its part is movably mounted in the direction of its longitudinal extension and parallel to the bending line and fixable, for example, capable of being clamped fast.
  • the carrier bearing the segments separably which ends with the central slide in any given case in connection with a processing machine with a central slide
  • the carrier bearing the segments separably which ends with the central slide in any given case in connection with a processing machine with a central slide) for its part is movably mounted in the direction of its longitudinal extension and parallel to the bending line and fixable, for example, capable of being clamped fast.
  • the drive motor for the spindle for adjusting the coupling element can be an electric motor which is coupled with a synchro-transmitter. This permits a very simple measurement of the respective position of the coupling element and a repetition of certain adjustment movements. That means that the adjustment of the coupling element can be preprogrammed and be conducted through the synchro-transmitter.
  • the pivot drive for the gear shaft for pivoting the coupling projection can be blocked in or out of engagement in relation to the drive motor for the spindle such that it is activatable only in connection with a standing spindle drive. In this way, rotation of the coupling element into coupling engagement during its axial adjustment can be prevented if the coupling drive is not in agreement with a recess or, in the opposite case, an uncoupling process can take place during an adjustment of the coupling element with the segments coupled with it.
  • a processing machine results, especially for edging or bending sheet metal and sheet parts, the hold-down device tool being adaptable to the most varied dimensions by displacing the individual segments which form the hold-down device, whereby the displacement of individual segments for forming variously dimensioned groups of segments can be implemented very simply with a single coupling element without expensive clamping devices or the like being needed on the individual segments. Rather, matching couplings to the coupling element are provided, for example in the form of recesses.
  • the adjustment drive and drive elements can also be very simply and robustly configured, for example, in the form of a worm drive and a toothed shaft. Moreover these drive mechanisms and the coupling element can be accommodated and well protected inside the carrier for the segments so that they do not require additional space.
  • FIG. 1 is a view, partially in section, of a beam of a hold-down device which is subdivided into segments for a processing machine for plate-like workpieces, with the drive and the guides accommodating the beams as well as the machine frame having been left out for the sake of a better overview, and a central slide which separates two groups of segments from each other is mounted in the middle of the beam, each of which has a drive mechanism for moving the segments;
  • FIG. 2 is a schematic representation of a displacement position of the segments such that in any given case the hold-down device formed by them has a gap;
  • FIG. 3 is a representation similar to FIG. 2, in connection with which all segments are pushed together, whereby at the same time, as is indicated in FIG. 2, the central slide can moreover be lifted;
  • FIG. 4 is an enlarged view having a cross section of a carrier joined with the beam in whose longitudinal direction the segments are individually or jointly movable, whereby the carrier contains an adjustable coupling element in its interior which is movable into a desired position for coupling with a selected segment in any given case, and a side view of a segment fixed on this carrier by means of a connection strip and a latch, with the coupling element being disengaged;
  • FIG. 5 is a view corresponding to FIG. 4 in which the connection strip is separated by means of a piston drive and the latch situated on the opposite side is opened by means of a gripper, and the segment is moved out of its operating position or is situated just in front of being inserted into its operating position and mounting on the carrier;
  • FIG. 6 is a view corresponding to FIGS. 4 and 5 whereby the segment is separated from its mounting on the carrier or is located in front of its insertion into the mounting on the carrier;
  • FIG. 7 is an enlarged representation of the carrier for the segments which shows the mounting position of a segment on the carrier and the engagement of a retaining rail of the connection strip on the carrier on the one hand and on a segment on the other;
  • FIG. 8 is a view of a connection strip and its retaining rail subdivided into individual comb-like rails
  • FIG. 9 is a greatly enlarged representation of the area marked by a circle designated "A" in FIG. 7, with the two contact points of the individual rails of the connection strip on the carrier and on a segment;
  • FIG. 10 is a cross section of the opened coupling between coupling element and segment in a cross section of a toothed shaft for pivoting the coupling element;
  • FIG. 11 is a view corresponding to FIG. 10 after pivoting the coupling element so that its coupling engages into a matching coupling of the segment configured as a recess;
  • FIG. 12 is a cross section taken along line A--A in FIG. 10 through the coupling area and at the same time through the coupling driving unit with a plan view of a segment, whereby the coupling driving unit is out of engagement,
  • FIG. 13 is a cross-section through the coupling area and through the coupling driving unit situated in coupling engagement, taken along line B--B in FIG. 11;
  • FIG. 14 is a cross-section view of a coupling element and the nut of a worm drive carrying this coupling element rotable relative to it, and the toothed shaft which serves to rotate the coupling element in the area of its mounting far from the driving element;
  • FIG. 15 is a cross-sectional view of the drive of the spindle for the axial adjustment of the coupling element of the series of individual segments with a synchro-transmitter as well as the driving mechanism for the toothed shaft.
  • FIG. 1 A processing machine is shown in FIG. 1, in which a beam 2 is shown and the driving element and the guides have been omitted for clarity.
  • the processing machine is for processing work pieces 1 indicated in dotted lines in FIG. 1, and partially indicated in FIG. 4, which are made of sheet metal and which are to be provided with bent edges 1a.
  • the lower longitudinal edge of the processing machine includes a hold-down device designated overall with 3 which is subdivided into individual segments 4.
  • the workpiece 1 can therewith be clamped on a workpiece support 5, as shown in FIG. 4, which appropriately extends over at least the entire length of the hold-down device 3.
  • the bending tool for bending the edges is moreover not represented in the drawings for the sake of simplicity.
  • the segments 4 are arranged in a row alongside one another in accordance with FIGS. 1 to 3 and 14 in the direction of orientation of the workpiece support 5 and the beam 2, and therewith to a processing line in the case of a bending machine, thus in the direction of a bending line, and are mounted to be either movable or fixable in this direction in accordance with the arrows Pf1, Pf2, Pf3 and Pf4.
  • the segments are selectively separably couplable with an adjustment drive (generally designated with 6), basically extending over the length of the hold-down device beam 2 in question in a manner to be described.
  • two hold-down devices 3 comprised by segments 4 are provided with an adjustment drive 6 and are situated on both sides of a height adjustable central slide 7 arranged between.
  • the two hold-down devices 3 and their adjustment drive mechanisms 6 are arranged in practically mirror image symmetry to this central slide 7, so that correspondingly many processing possibilities arise in an inherently familiar manner, since, for example, workpieces 1 of various sizes can be processed according to the arrangement of gaps 8 between segments 4.
  • a single coupling element 9 is continuously adjustable or movable on the respective adjustment drive 6 in the direction of the rows formed by the segments 4 and in the direction of the extension of the beam 2.
  • the adjustment drive 6 moreover brings about this displacement of the coupling element 9 in a manner yet to be described.
  • This coupling element 9 can be coupled with this in any desired position of a segment 4, whereby each segment 4 has a yet to be described matching coupling for separable connection with this adjustable coupling element 9.
  • the element of the adjustment drive 6 carrying the coupling element 9 in a manner to be described namely a rotatably drivable spindle 10, is arranged within a carrier 11 which retains the segments 4 arranged alongside one another on the beam 2 in accordance with FIGS. 1 and 4 to 6 as well as 10 and 11.
  • the drivable spindle 10 is arranged in an interior cavity 12 of this carrier 11 in the described embodiment, which interior cavity 12 extends over the length of the carrier 11.
  • the coupling element 9 has a coupling driving unit 13 projecting area-wise in relation to its periphery or its outer contour (downward in the embodiment) in the coupling position in accordance with FIGS. 11, 13 and 14 in relation to the area of the contours of the carrier 11 adjacent to it and engages into a matching coupling of a segment 4.
  • the matching coupling is a recess 14 in the embodiment which represents a form of such a matching coupling which is especially easy to manufacture and handle.
  • the coupling element 9 can be uncoupled from this coupling position relative to the adjustment drive 6 and the matching couplings of segments 4 constructed as recesses 14, whereby such an uncoupled position is represented in FIGS. 4 to 6 and 10 and 12.
  • the coupling element 9 is pivoted on the adjustment drive 6 about an axis directed parallel to the adjustment drive 6 of in the direction of orientation of this adjustment drive.
  • the pivot bearing 15 of the coupling element 9 is recognizable in FIG. 14 in a section through this coupling element 9 and its pivot bearing 15.
  • the adjustment drive 6 is a linear drive which protrudes on one side above the row of segments 4 and has a drive motor 16 in this protruding area.
  • the linear drive forming the adjustment drive 6 is a worm gear in the described embodiment, with the already mentioned rotable spindle 10 and a nut 17 carrying the coupling element 9, once again clearly recognizable in FIG. 14, which is secured or blocked against a rotation through two lateral strips 17a which engage axially displaceable in grooves 17b in the interior cavity 12 of the carrier 11, so that a rotation of the spindle 10 leads to an axial adjustment of this nut 17 and therewith of the coupling element 9 borne by this.
  • the stationary spindle can thus be rotated so that the coupling element 9 is adjustable in the axial direction of the spindle 10 by means of the nut 17.
  • the pivot bearing 15 is arranged on a front face of the nut 17 so that the coupling element 9 is situated in front of the nut 17 when viewed from the drive motor 16, and this way can also include segments 4 spaced as far apart as possible.
  • the segments 4 are held individually separable on the carrier 11. That means that they can not only be moved, but also removed to form more or less greater gaps 8 and/or be replaced by segments 4 of other dimensions. This separable mounting of the segments 4 can be recognized and explained on the basis of FIGS. 4 to 9.
  • the carrier 11 has in the described embodiment two grooves 21 and 22 staggered as to height in relation to each other which are open toward the same side, namely the reverse side (see especially FIG. 6) which one can also designate as undercuts in relation to a vertical.
  • the two grooves 21 and 22 are at a distance from each other viewed horizontally and run parallel to each other in the direction of the extension of the carrier 11.
  • Projections 23 and 24 arranged on the segments 4 fit in the grooves 21 and 22, and correspond to the appropriate dimensions of grooves 21 and 22 in their distance, size and height, and between which the front face of the respective segment 4 having the recess 14 as a matching coupling extends. If both projections 23 and 24 are in engagement in the grooves 21 and 22 in accordance with FIGS. 4 or 10 and 11, the coupling element 9 and its coupling driving unit 13 also has the proper position in relation to the matching coupling constructed as a recess 14.
  • the carrier 11 in the described embodiment has a connection strip 25 which has a retaining rail 26 overlapping the segments 4 in their holding area, and especially in the area of the projection 23 engaging into groove 21 from above.
  • the segments 4 are fixable in their engagement position on the carrier 11.
  • connection strip 25 takes place by means of working cylinders 27 arranged alongside one another over its length and embedded in the carrier 11, with pistons 28 which are adjustable relative to the cylinders 27 whose piston rod 29 is connected with the connection strip 25.
  • the retaining rail 26 is subdivided into individual comb-like rails 26a in the embodiment in accordance with FIG. 8, whereby the width and distance of the individual rails 26a is less than the width of the segments 4 oriented in the direction of displacement, even of the narrowest segment 4.
  • FIG. 8 one will recognize clearly that in this way at least one individual rail 26a engages on a segment 4.
  • this application is, however, dependent upon the adjacent individual rails 26a in any given case. Since the individual rails 26a have a certain elasticity and spring action, each segment 4 is pressed upon by one or more individual rails 26 in its operating position.
  • the retaining rail 26 has or the individual rails have in accordance with FIG. 9 an arrangement 26b on the carrier 11 and an arrangement 26c on segment 4, and in between a recess 26d. If segment 4 is missing, the retaining rail 26 nonetheless has a support through its arrangement 26b, which, however, is not effective if the individual rod 26a presses with the installation 26c against a segment 4.
  • a latch 30 is provided on each segment 4 for fixing the mounting position of the segment 4 on the carrier 11, especially when the connection strip 25 is opened or loosened.
  • the latch 30 is arranged adjacent to the projection 24 lying further away from the connection strip, which engages into the undercut 22, and is spaced deeper in the carrier 11 when the segment 4 is in its operating position.
  • the latch 30 is vertically movably mounted on segment 4 in a guide 31, which is most clearly recognizable in FIGS. 12 and 13, and has the form of a T groove.
  • a longitudinally continuous depression 32 On carrier 11, a longitudinally continuous depression 32, having a somewhat step-like form in the illustrated embodiment, into which the latch 30 in accordance with FIG. 4 engages with its latch end 30a in the closed position.
  • a gripper 33 is represented in FIGS. 4 to 6 which is suited for a mechanical opening of the latch 30 and at the same time can grasp a segment 34 after opening the latch and separate it from the entire association.
  • the gripper 33 has clamps 34 adjustable vertically in relation to one another which can engage on a grasping strip 35 on the one hand and on the latch 30 on the other on appropriate projections. The adjustment motions of the clamps 34 first lead to the vertical retraction of the latch 30 downward, through which segment 4 in accordance with FIG. 5 is at the same time grasped firmly so that it can be raised out of its mounting after opening the connection strip 25. Conversely, such a segment 4 can also be brought to the carrier 11 again with the aid of the gripper 33 and inserted into grooves 21 and 22.
  • Each segment 4, which is provided is both exchangeable and movable, and has at least one recess 14 on its upper front face in the operating position, visible in FIGS. 12 and 13, between the projections 23 and 24 which interact with the undercuts or grooves 21 and 22 of the carrier 11, which, as already mentioned above, serves as a matching coupling for the coupling projection and the coupling driving unit 13 of the coupling element 9.
  • the width of the recess 14 oriented in the direction of motion here almost corresponds to that of this coupling driving unit 13.
  • the recess 14 on a segment 4 serving as a matching coupling is open to one side in a direction of movement, thus perhaps has the form of a negative step.
  • the recess 14 is then bounded by the neighboring segment so that it, bounded at the edge of a segment 4 by the adjacent segment 4, overall has the groove-like cross section recognizable in FIG. 14.
  • Such a recess is especially easily producible.
  • the coupling driving unit 13 in the illustrated embodiment has a somewhat larger breadth than this unilaterally open recess 14, and that a bilateral inlet slope 13a is provided on the coupling driving unit 13 which can engage into the recess 14.
  • a bilateral inlet slope 13a is provided on the coupling driving unit 13 which can engage into the recess 14.
  • one, and if need be several, bilaterally bounded recesses 39 can also be provided as a matching coupling on especially wide segments 4, in connection with which then the groove cross section is completely worked into the material of segment 4.
  • the width of these recesses 39 here obviously corresponds to that of the coupling driving unit 13 or exceeds this slightly. Consequently, the segment 4 can be moved in both directions when the coupling driving unit 13 engages into this recess 39, while with engagement into a recess 14 open to the edge side, the displacement of this segment is only possible toward one side.
  • a further extension of the versatility results from the fact that the carrier 11 separably bearing the segments 4 is for its part movable in a direction of its longitudinal extension and parallel to the bending line, in a dovetail guide 40 in the illustrated embodiment, supported and fixable, for example clampable fast.
  • a dovetail guide 40 in the illustrated embodiment, supported and fixable, for example clampable fast.
  • the dovetail-like matching element 42 contains a channel 43 out of which one or more clamping elements 44 can be activated and which are adjustable against the interior of groove 41.
  • carriers 11 can be moved away from the center in order to be able to move all segments 4 held on them or to be able to move a special adjustment or displacement position of these segments 4.
  • the carriers 11 can nevertheless also be moved one upon the other.
  • the drive motor represented in FIGS. 1 and 15 for the spindle 10 for adjusting the coupling element 9 is an electric motor in the preferred embodiment which is coupled to a synchro-transmitter 45 so that it is possible to repeat and automate the adjustment of segments 4 over and over again, and in particular to preselect from the beginning through an appropriate program control.
  • the synchro-transmitter 45 ensures in an inherently familiar manner that the spindle 10 executes the required number of revolutions and angular rotations in order to bring the nut 17 and therewith the coupling element 9 into the coupling position desired in each case in relation to a selected segment 4.
  • the pivot drive 46 for the toothed shaft 18 is arranged adjacent to the drive motor 16 and serves to pivot the coupling drive 13 into or out of engagement, and is electrically blocked in relation to the drive motor 16 for the spindle 10 such that it is only activatable when the worm drive is standing. This way, the pivoting of the coupling driving unit 13 into the coupling position during an adjustment of the nut 18 and the coupling element 9 and its thereby being damaged or for its part destroying areas in the segments 4 can be prevented this way.
  • the coupling driving unit 13 is, as already mentioned, out of engagement in FIGS. 4 to 6. It nonetheless protrudes downward somewhat out of the carrier 11 in the area of the front face of segments 4. Nonetheless, so that axial adjustment is possible without difficulty, a continuous groove 37 is provided on the front face of segments 4 in accordance with FIGS. 4 to 7 and especially in accordance with FIGS. 13 and 14 in the direction of extension of the spindle 10 from which the recesses 14 and 39 proceed in any given case in accordance with FIGS. 12 and 13.
  • a processing machine for plate-like workpieces especially a bending machine, has a strip-like vise holder 5 as a workpiece support for supporting the workpiece 1 to be processed and a hold-down device 3 which is subdivided into individual segments 4 which are movable relative to one another in the direction of the bending line and especially also interchangeable in order to be able to execute an adaptation to differing dimensions and shapes of the workpiece 1 to be processed.
  • the edges 1a on a workpiece 1 can be bent such that they even form undercuts, but the separation of this workpiece 1 so processed from the hold-down device 1 nevertheless remains possible.
  • a single coupling element 9 is continuously adjustable in the direction of the bending line for such a group of segments 4, and has a coupling driving unit 13 for engagement into a corresponding matching coupling, preferably a recess 14 and/or 39 on the segment 4 in question, so that the construction of segments 4 is very simple from the perspective of production and construction, and no special measures in reference to segments 4 are necessary for executing a displacing movement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Machine Tool Copy Controls (AREA)
US09/261,336 1996-09-07 1999-03-03 Machining center for processing flat workpieces with a segment distributed hold-down Expired - Fee Related US5996389A (en)

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DE19636463A DE19636463C2 (de) 1996-09-07 1996-09-07 Blechbearbeitungsmaschine für plattenförmige Werkstücke mit einem in einzelne Segmente unterteilten Niederhalter
DE19636463 1996-09-07

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PCT/EP1997/004006 Continuation WO1998009743A1 (fr) 1996-09-07 1997-07-24 Machine a usiner des plats dotee d'une serre-flan reparti en segments

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EP (1) EP0925126B1 (fr)
JP (1) JP2000506783A (fr)
AT (1) ATE191662T1 (fr)
DE (2) DE19636463C2 (fr)
ES (1) ES2146114T3 (fr)
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Publication number Priority date Publication date Assignee Title
IT201800020824A1 (it) * 2018-12-21 2020-06-21 Bystronic Laser Ag Release device for an industrial machine for the bending of metal elements
US11992872B2 (en) 2018-02-21 2024-05-28 Trumpf Maschinen Austria Gmbh & Co. Kg Manufacturing facility with a tool-changing unit and clamping jaw, and method for changing a tool

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ES2229879B1 (es) * 2003-02-20 2006-02-16 Goiti, S. Coop. Maquina plegadora de chapas perfeccionada.
ITPD20110222A1 (it) * 2011-06-30 2012-12-31 Xp Technology S R L Macchina utensile pannellatrice con meccanismo migliorato di blocco e sblocco per utensili
PL2939753T3 (pl) * 2014-04-30 2017-05-31 Salvagnini Italia S.P.A. Maszyna zginająca metalową blachę
CN113617902B (zh) * 2021-07-16 2023-07-25 南京蓝昊智能科技有限公司 一种折弯机自动可调式上压组合机构

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JPH041020A (ja) * 1990-04-18 1992-01-06 Mitsubishi Plastics Ind Ltd 把手付ボトルの製造方法
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JPS58148021A (ja) * 1982-02-26 1983-09-03 Hitachi Ltd 板材折曲げ装置
JPS58167731A (ja) * 1982-03-29 1983-10-04 Ensuikou Seito Kk 「鎔」融金属用保温材
EP0105091A2 (fr) * 1982-09-08 1984-04-11 Maru Kikai Kogyo Co., Inc. Dispositif pour modifier la longueur de l'outil dans une machine à plier les panneaux
JPS61103626A (ja) * 1984-10-29 1986-05-22 Maru Kikai Kogyo Kk 折曲げ機のクランプ型長さ変換装置
EP0310145A2 (fr) * 1984-12-29 1989-04-05 Maru Kikai Kogyo Co., Ltd. Machine à cintrer
US4722214A (en) * 1985-03-12 1988-02-02 Murata Kikai Kabushiki Kaisha Split die for holding work during bending operation
US4930332A (en) * 1986-06-30 1990-06-05 Maru Kikai Kogyo Co., Ltd. Apparatus for exchanging tool for bending machine
EP0257015A2 (fr) * 1986-08-14 1988-02-24 SALVAGNINI S.p.A. Dispositif de pliage de tôles
EP0258204A2 (fr) * 1986-08-14 1988-03-02 SALVAGNINI S.p.A. Dispositif de pliage de tôles
EP0274159A2 (fr) * 1987-01-09 1988-07-13 SALVAGNINI S.p.A. Machine à plier pour la production de panneaux rectangulaires en tôle à partir de tôles planes
JPS6454822A (en) * 1987-08-25 1989-03-02 Nec Corp Digital agc circuit
JPH041020A (ja) * 1990-04-18 1992-01-06 Mitsubishi Plastics Ind Ltd 把手付ボトルの製造方法
JPH06190447A (ja) * 1992-12-25 1994-07-12 Murata Mach Ltd 板材折曲機の金型交換装置
EP0682996A2 (fr) * 1994-02-10 1995-11-22 Balaxman Oy Méthode et dispositif d'une presse plieuse
EP0694346A1 (fr) * 1994-07-27 1996-01-31 SAPIM AMADA S.p.A. Pince de serrage à assemblage variable

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11992872B2 (en) 2018-02-21 2024-05-28 Trumpf Maschinen Austria Gmbh & Co. Kg Manufacturing facility with a tool-changing unit and clamping jaw, and method for changing a tool
IT201800020824A1 (it) * 2018-12-21 2020-06-21 Bystronic Laser Ag Release device for an industrial machine for the bending of metal elements
EP3670016A1 (fr) * 2018-12-21 2020-06-24 Bystronic Laser AG Dispositif de dégagement pour une machine industrielle de pliage d'éléments métalliquesmétalliques

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ES2146114T3 (es) 2000-07-16
WO1998009743A1 (fr) 1998-03-12
PT925126E (pt) 2000-10-31
JP2000506783A (ja) 2000-06-06
DE19636463C2 (de) 1998-07-02
DE19636463A1 (de) 1998-04-02
ATE191662T1 (de) 2000-04-15
EP0925126A1 (fr) 1999-06-30
EP0925126B1 (fr) 2000-04-12
DE59701447D1 (de) 2000-05-18

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